Magnetization behaviour of permanent magnets

Magnetization behaviour of permanent magnets

Standard Number NPR-IEC/TR 62517:2009 en
Organization Netherlands Standardization Institute Netherlands
Level National
Category Test Method | Characterization | Measurement
Status
  • MAY 2009 Published
ABSTRACT
It is within the scope of this technical report to describe the magnetizing behaviour of permanent magnets in detail. Firstly, in Clause 3 the relationship between the applied magnetic field strength and the effectively acting internal field strength is reviewed. In Clause 4 the initial state prior to magnetization is discussed. Then, in the main Clause 5, the magnetizing behaviour of all common types of permanent magnets is outlined. The clause is subdivided according to the dominant coercivity mechanisms, namely the nucleation type for sintered Ferrites, RE-Fe-B and SmCo5 magnets, the pinning type for carbon steel and Sm2Co17 1 magnets and the single domain type for nano-crystalline RE-Fe-B, Alnico and Cr- Fe-Co magnets. Finally, the recommended magnetizing field strengths for modern permanent magnets are compiled in a comprehensive table.